Php uses the header function to download various files

This article mainly introduces in detail the php code for downloading various files using the header function. if you are interested, you can refer to the example in this article to share the php header function file download implementation code, for your reference, the specific content is as follows:

Http://www.php.net/manual/en/function.readfile.php

 404 File not found!");} // Gather relevent info about file $ len = filesize ($ file); $ filename = basename ($ file ); $ file_extension = strtolower (substr (strrchr ($ filename ,". "), 1); // This will set the Content-Type to the appropriate setting for the file switch ($ file_extension) {case" pdf ": $ ctype = "application/pdf"; break; case "exe": $ ctype = "application/octet-stream"; break; case "zip ": $ ctype = "application/zip"; break; case "doc": $ ctype = "application/msword"; break; case "xls": $ ctype = "application/vnd. ms-excel "; break; case" ppt ": $ ctype =" application/vnd. ms-powerpoint "; break; case" gif ": $ ctype =" image/gif "; break; case" png ": $ ctype =" image/png "; break; case "jpeg": case "jpg": $ ctype = "image/jpg"; break; case "mp3": $ ctype = "audio/mpeg"; break; case "wav": $ ctype = "audio/x-wav"; break; case "mpeg": case "mpg": case "mpe ": $ ctype = "video/mpeg"; break; case "mov": $ ctype = "video/quicktime"; break; case "avi ": $ ctype = "video/x-msvideo"; break; // The following are for extensions that shouldn't be downloaded // (sensitive stuff, like php files) case "php": case "htm": case "html": case "txt": die ("Cannot be used for ". $ file_extension." files!"); Break; default: $ ctype =" application/force-download ";} $ file_temp = fopen ($ file," r "); // Begin writing headers header ("Pragma: public"); header ("Expires: 0"); header ("Cache-Control: must-revalidate, post-check = 0, pre-check = 0 "); header (" Cache-Control: public "); header (" Content-Description: File Transfer "); // Use the switch-generated Content-Type header ("Content-Type: $ c Type "); // Force the download $ header =" Content-Disposition: attachment; filename = ". $ filename. ";"; header ($ header); header ("Content-Transfer-Encoding: binary"); header ("Content-Length :". $ len); // @ readfile ($ file); echo fread ($ file_temp, filesize ($ file); fclose ($ file_temp); exit () ;}>

The above is all the content of this article. I hope it will help you learn and support PHP.

For more articles about how php uses the header function to download various files, refer to the PHP Chinese website!